Body-dumping mechanism



July '14, 1925.

L. M. SPENCER BODY DUMPING MECHANISM 4 Sheets-Sheet 1 Original Fil Aug. 29. 1918 July 14, 1925.

L. M. SPENCER BODY DUMPING MECHANISM Original Filed Aug. 29, 1918 4 SheetS-Sh t 1918 4 Sheets-Sheet 3 R\\\ /1711 7/14 YIIIIIIIIIIIIAIIIIIIIIA 'IIIII/lIl/fl L. M. SPENCER BODY DUMPING- MECHANISM Original Filed Aug. 29

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July 14, 1925.

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July 14, 1925. 1,546,261

L. M. SPENCER BODY DUMPING MECHANISM Original Filed Aug. 29. 1918 4 Sheets-$heet 4 Patented July 14, 1925,

LOUIS M. SPENCER, or HIGHLAND PAIR-K, MICHIQAN;

BODY-DUMIBING MECHANISM.

ona ine ca i file August -2 1,918, e r a He 0 v eei ee thi erp iee iei he he a 1922, s e m?- iw i R new J nuar 1-10 1 9 To all w ham it may} concern Be it known that I, Longs M. sprpnon i, a citizen of the United States, and a resident of Highland Park, county of lyayne, and'State of Michigan, have invented certain nee and ns eful Improvements in Body- Duniping Mechanism, of which the following is a $1311, clear, concise, and exact-description, such as will enable others skilled in the art to which the invention relates to make and .use the same, reference being made therein to the accompanying tlraiv ings, which form apart of this specification The present application is adivision 01 my application S. N. 251,907 filed August 29', 1 918, and relates to mechanism for tilting vehicle bodies.

In the drawings, Fig. l is a side view showing a. preferred embodiment of th i vention. Fig. 2 'is a plan view corresponding thereto, pants being hrolgen away and the trailer body being omitted. Fig. 3 is asection on about .theline of Fig. 1. showing the general arrangement of the pump and associated parts, which. .for sake ,of clearness. are omitted in Figs. l and 2. Fig. 4 is a similar enlarged fragmentary vietv of the ripper end portion of the .unit. Figs. 5 and ,6 are a side view and a ,plan view. respectively corresponding to F ig. 4. Figs. 7 ,and 8 are .frz grnentany views corresponding to Figs. .4 and v5 and showing a modification wherein the different connections ,are independently made. Fig. -9 is an enlarged fragmentary front view of the hoisting; mechanism on the trailer. Fig. 10 is ,a side view corresponding thereto, parts being broken away. Fig. -11 is a section on the line 11-l1 oi 1Q, thesheave guard being removed. Fig. .12 is a fragmentary plan view showing the spacer bar for hold- ,ing the trailer spaced .fKOI the truck, the ,draw liar being omitted. Fig. 13 is aside view showing the application of the mechanism which appears in Figs. .9 1,0 and 11 ton .tvvo-ivheeledtrailer. Fig. 1 4 shows the manner et ,lifting the trailer ,frame from the pulling vehicle.

Th t u a ndica d i Fi i ,cl d es the frame 1, the body? tiltahlethereon about the pivots Shand the :i ip st-anding hydraulic cylinder 4 which contains a p.is-

i n; m .e own hai h s [the n s g and 6 w r y e iiietq i qq lt lita t e projecting therefrom, A p iunp .8, driven i mhh p ope ng e he has by the hhfl 0 d c ain g: draw joiiith xoiigh the u q pipe 2 tr i the .e pa isliq er and expels itlthro gh the p ess re plpe .1 ha k into h ylinder h le w t ip ete thtis causing the latter to rise. T e piston ed 6 prvv eed with ai s. e m q hea 16. The qonsltruction far described is W l lmow as s $1 .9 e' ee ie o iherew gt a Pa r 9 h y ,1 .es ;h ,eqha izih i h b 29 5- ;HQW Y I, h pu l y ha e Q Q iQ- "i been permanently attached to. the pross arm Whereas 121 the present nstance they are readily deachahl e :the refrorn as pointed out later.

Sli e -Pd 9 he e p nse? ta k; 1 h hpne m f he y h in hey iiiteh t ey as; xample, hr mai hi the uid fl ng .31 ith whic he .ehk t e y er head .32 may he pr v d here a h ir o Plates .3r h e 'may'he slid forward and back under the cross arm or head. T e pla es .35 are'joined h thfiir t e fi re ends to te m a ai eriiuppe fihi bol e rushing .hhil ierd y h reonih i he 9e may he 1 w e a Suggested L hor th t th Pl s may he uppe'nt for m r mentrelative to the piston'rod in varions vays qther than ,that s hown. The plates ar prefera y ea h p o edthe fire- A ra ed t he rece ve in th n tch e is acrqss bar 44 he central portion ,of which i cu e t defe the p s on e (F g and .t enlsf f which are preie h We de i rl t in t e .ho'ok h 'eh here .4 ,the'lower ends ,of which cables 46 ,are attaehejd. The lower surface of thecr'o'ss her 44 is hhedzhaie .thelp t 3,51 ins har 20,, anchor strap 21" and 22.

the chair is at the cated at 48, Fig. 4, from which it follows that the hook bars are normally maintained symmetrically disposed with reference to the longitudinal central vertical plane of the cylinder; and the position of the notches 42 is such that the'hooks 45 at the upper ends of the bars 45 are centrally above the cross arm 16 when the chair is at its rearward limit of movement whereas, henthe chair is at its limit of movement forwardly (Fig. 5), the hooks 45 are out of the path ofthe cross arm. a v

In like manner, the pivot pins'5O of the .pulleys 18 are hung inst-raps 51 that are themselves pivoted at 52 to hooks 53, and the latter are joined by a cross bar 54which is, except in matter of length, the counterpart of the cross bar, 44. The .bar 54, as

will be readily understood, is adapted to rest shown in 5, the hooks 53 are in the path vof the crossarm and will be picked up or caught and elevated thereby; however, when limit of its movement rearwardly, they are out ofthe way. Were no means provided to prevent it, the weight of the p-ulleys and associated parts would tend to swing the hooks 53 counterclockwise-(Fig. 5) in the notches 43 backinto' the path of the cross arm the hooks are therefore provided with lugs 55 that lie in the planes o'f-the'straps 51 below the center lines of the pins 52. The same thing may be accomplished in other ways,,for example,

the straps maybe made integral with the hooks but the construction shown is preferred since it lends itself readily to commercial processes of manufacture.

- To repeat :VVhen the parts are in the positionshown 5), the hooks 53 will be caught by the rising crossarm and the .truck body tilted, whereas whenthe chair is shifted backwardly the hooks 4545 will in vturnbe lifted. The reverse arrangement would be less desirable since the hooks 45" might be in .the way ofthe rising truck body. Moreover, the jarring of the vehicle,

acting. through the surfaces 48 and the upper surfaces of the notches 4243, automatically tends to center both sets of hooks properly with reference to the .vertical longitudinal plane of the vehicle. which includes v the center line ofthe piston.

,.T.t is evidentthat the hooks-45 45 might be replacedby .a second pair of hooksand pulleys the counterpart of' the elements l8.=53 and that the latter might likewise be replaced. by .a second pair of hooks 45..-45. In any. event, the .chairisheld in .one of;,its limiting positions and gravity maintains the .pairs of hooks always proper- -ly. pos1-tioned; both longitudinally and transverselv. on the chair sothat the stresses in ji-llf3;plStO11 red are minimized and, for the most part, indirect compression.

, ends of the front cross bar 66 As indicated in Figs. 7 and 8, the two sets of hooks may be independently operated by using in lieu of each plate 35 a pair of plates 35 and 35", and by cutting away the upper rear portions of the former and the upper be used to actuate either set at will. It will also be understood that in some instances it may be necessary'to employ but one shiftable set, the other cables being actuated whenever the piston rod is' projected. V

In the embodiment of the invention shown all":

in Figs. 1 and 2, the cables 46 pass down through pulleys 66 on the base 61 of the hoist and thence rearwardly was four wheeled trailer. While the means forutilizing the. cables to tilt the trailer body 62 about the pivots 63 on the frame 64 is subject to wide variation, itis preferred to employ the mechanism shown, since it not only PIOVlClQS. for low clearance and high tilting but also requiresveryfew' accurate machining operat ons. This mechanism 1ncludes a base 65 mounted on cross bars. 66 andhaving threaded therein an upstanding pipe 68 which is, in'turn, threadedinto a head 69 that includes in its front portion the ears 7O bet-ween which the shaft 71 ofthe double pulley/Z2 is mounted. At the rear the head is provided with a, roller 73 mounted on the shaft 74 that.is carried in ears 75 joined and braced by the' web 76. These parts, which may be. manufactured with very little machine work, constitute a guide thatis preferably bracedby the laterally and forwardly diverging tension rods 7 8 which preferably extend to the outer Reciprocable in the guide is-a thrust bar 80. preferably formed of a pressed metal channel having its Web cut away at it s lower end atSO to allow clearance for the spherically faced roller 81 that turns on a shaft82 forming it in a single run and looping itv about. the pin. In the embodiment-shown both strands of the cable 84 pass around a double pulley 86 which ispivotally secured to the base 65 by the links 87 and pins 88-89;

Hit)

its lower end portion, a roller rotatable in the slot, a cable attached-to the lower end portion of the thrust bar for elevating the latter, and means whereby'the body is tilted as the thrust bar rises. Y

3. A vehicle comprising a tiltable body, an upstanding guide adjacent thereto, said guide comprising a base, a head, and a pipe section connecting the base to the head, a-

thrust bar reciprocable in the body, said thrust bar being slotted in its lower end portion, and a roller rotatable in the slot and having a substantially spherical surface of approximately the same diameter as the inner diameter of the pipe section, a roller and a sheave carried by the head and rotatable about parallel axes, said thrust bar passing through between the roller and the sheave and being adapted to bear on either the roller or the sheave, a cable passing over the sheave and anchored tothe lower end portion of the thrust bar, and means whereby the body is tilted as the thrust bar rises. 1

4:. In a dumping vehicle, atiltable body, an upstanding guide adjacent said body, a thrust bar substantially U-shaped in crosssection reciprocable therein, means associated with the upper end of the bar for tilting the body as the'bar rises, a sheave carried by the upper end portion of the guide, a cross-pin passing transversely through the lower end of the bar, a. cable passing over the sheave and being looped around the cross-pin for lifting the latter, and a roller carried by the bar below the cross-pin and co-acting with the guide to steady the bar and reduce friction;

5. In a dumping vehicle, a tiltable body, an upstanding guide forwardly of said body, a thrustbar reciprocable therein, a sheave mounted on the upper portion of the guide, a second sheave near the base of the, guide, a link pivotally connected to the guide and carrying a pin aboutthe axis of which the second sheave is rotatable, a cable passing over the first sheave and under the second sheave and anchored to the lower end of the. thrust bar whereby the latter may be elevated, and means associated with the upper end'of the bar for tilting'the body asthe bar rises.- I

6. In a dumping vehicle, a tiltable body, an upstanding guide, a thrust bar reciprocable therein, means for tilting the body as the bar rises, the guide. including ahead, a rotatable sheave carried by the head, a cablepassing over the sheaveand attached to the lower end-of the bar to elevate the latter, a cable guard for the sheave carried by the head, said guard including a strap of metal bent to approximately conform to the circumference of the sheave fora con siderable angular distance, and a second metal strap secured to the first strap and including end portions extending inwardly from the circumference of the sheave and fixed to the head.

7. A. vehicle including a tractor frame, a semi-trailer frame having its front end carried by the ,tractor frame. said semitrailer frame being swingable in respect to the tractor frame about a vertical axis, a body carried by the semi-trailer frame and tiltable about a. horizontal axis near the rear end thereof, an upstanding guide mounted on the semi-trailer frame forwardly of the body, a thrust bar reciprocable therein, cable means actuated by the thrust bar for lifting; the front end of the body as the thrust bar rises, cable hauling mechanism carried by the tractor frame and cable means actuated by the cable hauling mechanism for lifting the thrust bar to thereby, tilt the body.

8. A vehicle including a tractor, a semitrailer having its front end supported by the tractor and swingable in respect there to about a substantially vertical axis, said semi-trailer including a frame and a body pivoted thereon to tilt, an upstanding guide mounted on said frame forwardly of the body and substantially in line with said axis, a. thrust bar reciprocable therein, cable means actuated by the thrust bar for liftin}; the front end of the body at substantially twice the speed at which said thrust bar rises, cable hauling mechanism carried by the tractor, and cable mea-nsactuated by the cable hauling mechanism for lifting the thrust bar. v

9. A self-propelled vehicle including a tractor, a semi-trailer having its front end supported by the tractorand swingable in respect thereto about asubstantially vertical axis, said semi-trailer including a frame and a body tiltable about a transverse hori- Zontal axis near therear end of said frame, an upstanding hydraulic jack carried by the tractor forwardly of the semi-trailer frame, and means whereby said jack maybe utilized to either tilt the body in respect to the frame or, to lift the latter free and clear from engagement with the tractor.

10. In combination, a steerable wheeled vehicle having a propelling engine and a supporting member, a wheeled frame having its front end supported by said member to swing horizontally relatively thereto, and meanscarried by said vehicle and operated by the'engine thereof for lifting the frontendiof said frame from said member.

11. In combination with a steerable, wheeled frame having thereon a propelling engine, an upright hoist mounted on said frame and actuated by said engine, a swingable wheeled frame having its front end resting on said first named frame, a body tiltable on said second named frame, and connections whereby said hoist may beutillO lized to tilt said body or to lift the front end of said second frame with reference to said first frame at will.

12. In combination, a tractor including a propelling engine, a wheeled frame having its front end normally supported by said tractor, a device operable by said engine and carried by said tractor and interposed between it and said frame to elevate the latter from said tractor.

13. In combination with a pulling vehicle having a propelling engine, a swingable wheeled frame having its front end resting on said vehicle, a body carried by said frame and tiltable in respect thereto, and means whereby said engine may be utilized to tilt said body or to lift the front end of said frame relatively to said vehicle at will.

14L. In combination with a tractor, a wheeled frame having its front end supported by said tractor by a fifth wheel structure, the upper part of which is attached to said frame, hoisting means carried by said tractor and actuated by the engine of said tractor for lifting the front end of said frame and said upper part of the fifth wheel structure from said tractor and from the rest of said fifth wheel structure.

In testimony whereof I' aflix my signature.

LOUIS M. SPENCER; 

